Not sure if this helps, but there is a website that you can send photo's of barcodes and it will read it and send the info back. My hunch is google, but might not have been. I saw the info here on ITT, the rest of the thread had more ideas apparently the zxing project could be compiled for local use?

You might be able to build an app that automates capturing and sending the image to that website. It would be an interesting addition to knips, the photo capturing program.